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Seamless Stainless Steel Pipes & Tubes

Seamless Stainless Steel Pipes & Tubes

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Price : On Request

Introduction  and Scope

This covers straight cold drawn seamless ferritic, austenitic alloy steel, boiler, superheater and heat exchanger tubes.
Materials Material is ordered to comply with the requirements of ASTMA – 213 in grades 304, 304L, 304H, 316, 316L, 321, 347, 410 & 430 grades regularly. Special grades can be made as per customer’s requirements.
Size Range OD: 6.35 mm to 101.60 mm Thickness: As per customer specifications Length: As per customer specifications
Process Of Manufacture

The tube is manufactured from selected mother hollow pipes of required size and grade. These are manufactured by cold drawing process. All tubes are then annealed to a minimum temperature of 10500C, straightened, pickled and passivated, end finished and 100% tested in accordance with ASTM A 450.
Tolerances
OD Size Range Over MM Under MM
Under 25.4 0.10 0.10
25.4 to 38.1 Incl. 0.15 0.15
38.1 to 50.8 excl 0.20 0.20
50.8 to 63.5 excl 0.23 0.23
63.5 to 76.2 excl 0.30 0.30
76.2 to 101.6 excl 0.38 0.38
Test

Normal: Tensile strength , Yield strength, Elongation Flattening, Hydrostatic Pressure test Optional: Pneumatic / Air leakage, Eddy Current , IG Corrosion
Marking All pipes are marked as folows: ASTM A-213, Garde, OD, Thickness, Heat No.